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2 posts

Wannabe Geek


#268599 27-Mar-2020 18:10
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I currently have 1 TV (Samsung) with built-in Freeview (SAT) with the LNB power set to "ON" and two additional separate Freeview (SAT) receivers with the power set to off.  

 

All units are connected through a Matchmaster 10MM-DDA24.
  
No problem as long as I leave the TV (Samsung) is on.

 

My question is there any way to power the LNB without the TV or the other receivers being set to LND "powered ON". Ideally, I want the LNB powered separately from the TV and the receivers so that I don't need the TV to remain on to be able to watch on any other outlets?

I do not believe that the Matchmaster 10MM-DDA24 can provide LNB power.

 

 

  


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1959 posts

Uber Geek


  #2448475 27-Mar-2020 22:20
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The Brochure says it powers the LNB.

 

 

 

 

Features and Benefits

 

  • 4 Outputs
  • Frequency range 47-2150MHz
  • Electrostatic protection
  • LNB power on (18VDC)
  • Switchable Inputs
  • 4G/5G protection

541 posts

Ultimate Geek


  #2448500 27-Mar-2020 23:38
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The problem you have with powering the LNB is that the voltage used to provide the power also selects horizontal or vertical polarity.  Horizontal = 18 volts, vertical = 13 volts.  So it normally needs to be provided by the device that is selecting the polarity, in this case your TV.  With a dish that is just used for Sky and/or Freeview, you only need horizontal polarity, so if the Matchmaster can be made to output 18 volts itself, set it to do that.  Your photo shows that there is an 18 volt input into the Matchmaster, so it may well be able to output 18 volts to the LNB.


 
 
 
 




2 posts

Wannabe Geek


  #2448685 28-Mar-2020 11:43
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Thanks to both B1GGLZ and fe31nz

I measured the voltage for the matchmaster and it was outputting 18V.
I managed to get both the set top boxes going well by turning off the LNB power.

The Samsung TV was the problem. No matter what I did I had to have the LNB turned on for it to work. This is not ideal as it means two different 18V power sources to the LNB.
It turns out that I had to completely factory reset the Samsung TV and repeat the Satellite and Channel scan for it to recognize that the LNB already had power.
The Channel scan was the bit that must have been holding previous LNB ON settings. Frustrating but all good now.
Happy familys😉

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